Description Public address systems. Waterproof rust, heat-resistant low temperature, flame retardant, insulation. Application:Boat, yacht, motorcycle, SPA, swimming pool, ATV, UTV, garden, landscape, grass pool, etc. Hole size:About 13.5/5.31 inch Sinking depth:. 3.5cm/1.38 inch Frontal power:25W Power (Max.):60W Frequency response:70- 20000Hz Impedance:4 Ohm DB:87dB Size:17.5*5.6cm Material:ABS+ metal Colour:white Package Contents: 1 * pair Speakers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.